js回车事件

<intput type="text" onkeydown="Click()">
<script type="text/javascript">
function Click(){
if(event.keyCode == 13){ //按下回车键
//do something
}
}
</script>
或者：
<input type="text" onkeydown="if(event.keyCode==13){Click()}">
<script type="text/javascript">
function Click(){
//do something
}
</script>